Is there a way to run tests in parallel? For example, I have 6 tests in a file, I would like for all of them to be run on my HPC at the same time using slurm

there is an open issue for that: https://github.com/askimed/nf-test/issues/242

We have a custom script for that in our pipeline, but it only parallelizes over test files, not individual tests https://github.com/nf-core/pixelator/blob/master/tests/scripts/run_tests_parallel.sh